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ST92F120JR9T 数据表(PDF) 45 Page - STMicroelectronics |
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ST92F120JR9T 数据表(HTML) 45 Page - STMicroelectronics |
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45 / 320 page  45/320 ST92F120 - SINGLE VOLTAGE FLASH & EEPROM 3.2 FUNCTIONAL DESCRIPTION 3.2.1 Structure The Flash memory is composed of three parts (see following table): – 1 reserved sector for system routines (TestFlash including user OTP area) – 4 main sectors for code – 2 sectors of the same size for EEPROM emula- tion The last 128 bytes of the TestFlash are available to the user as an OTP area. The user can program these bytes, but cannot erase them. The last 4 bytes of this OTP area (231FFCh to 231FFFh for 128K Flash device and 230FFCh to 230FFFh for 60K/36K Flash devices) are reserved for the Non- Volatile Protection registers and cannot be used as a storage area (see Section 3.6 PROTECTION STRATEGY for more details). 3.2.2 Software or Hardware EEPROM Emulation (Device dependent option) The MCU can be factory-configured to allow the user to manage the EEPROM emulation by soft- ware (using for example the Intel algorithm), by di- rectly addressing the two dedicated sectors F4 and F5. In this case the Hardware EEPROM emu- lation will not be available. Hardware EEPROM emulation By default, a hardware EEPROM emulation is im- plemented using special flash sectors F4/E0 and F5/E1 to emulate an EEPROM memory whose size is 1/4 of a sector (1 Kbytes max). This EEPROM can be directly addressed from 220000h to 2203FFh for 128K Flash device and 220000h to 2201FFh for 60K/36K Flash devices. In this case, Flash sectors F4 and F5 are not di- rectly accessible. (see Section 3.5.1 Hardware EEPROM Emulation for more details). Table 7. Memory Structure for 128K Flash device Table 8. Memory Structure for 60K Flash device Sector Addresses Max Size TestFlash (TF) (Reserved) 230000h to 231F7Fh 8064 bytes User OTP Area 231F80h to 231FFFh 128 bytes Flash 0 (F0) 000000h to 00FFFFh 64 Kbytes Flash 1 (F1) 010000h to 01BFFFh 48 Kbytes Flash 2 (F2) 01C000h to 01DFFFh 8 Kbytes Flash 3 (F3) 01E000h to 01FFFFh 8 Kbytes Flash 4 / EEPROM 0 (F4/E0) 228000h to 228FFFh 4 Kbytes Flash 5 / EEPROM 1 (F5/E1) 22C000h to 22CFFFh 4 Kbytes Emulated EEPROM 220000h to 2203FFh 1 Kbyte Sector Addresses Max Size TestFlash (TF) (Reserved) 230000h to 230F7Fh 3968 bytes User OTP Area 230F80h to 230FFFh 128 bytes Flash 0 (F0) 000000h to 000FFFh 4 Kbytes Flash 1 (F1) 010000h to 017FFFh 32 Kbytes Flash 2 (F2) 018000h to 01BFFFh 16 Kbytes Flash 3 (F3) 01C000h to 01DFFFh 8 Kbytes Flash 4 / EEPROM 0 (F4/E0) 228000h to 2287FFh 2 Kbytes Flash 5 / EEPROM 1 (F5/E1) 22C000h to 22C7FFh 2 Kbytes Emulated EEPROM 220000h to 2201FFh 512 bytes 9 |
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